a = [1 2 3;
4 5 6;...
7, 8, 9];
a = [1, 2,]
[1, 2; 3, 4,;1,2

,
];

a(2)
a(end)
a(end:-1:1)
a(1:2:end)
a(1:end, 2) = [0, 0 ,0]
a(1:end-1)
a(1:4,end+(1:diff))
a(
1
)
a(
:
)
a(
1
,
1
)

arr = [
  1
];

arr = [...

 ...
  1
  ...

  ...
];

a(1:...
2);

a(1:
2);

a(1 ...
:...
2);

a(1
:...
2);

blueSeq = [
-1/2,-1;
-1/2,0;
1,0;
1,1;
-1/2,1;
-1/2,1/2;
1.5,1/2;
1.5,1.5;
]/3;

a = [
1 ...
+ ...
2
3
]
